Toshiba GR200 Series Instruction Manual page 1321

Supervision task of interruption capability on CB
For the supervision of the circuit breaker, the sigma_Iy function is provided so that the broken
current quantities at respective tripping are accumulated. Thereby, the user can monitor the
interrupting capability using the sigma_Iy function. When trip commands are issued, the
sigma_Iy function monitors the maximum current (I at CT primary) in every occurrence of the
fault, the sigma_Iy function accumulates each maximum fault current powered by a parameter
'y'. Thus, the user can find a synthesized broken current value using the sigma_Iy function.
Displaying error message founded by the sigma_Iy function is shown in Table 10.4-1.
Table 10.4-1 Supervision items and error levels for Sigma_Iy
Sec.No. Supervision items(Screen message)
10.4.1 Sigma Iy error (CHK_SGMIY error)
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Note: The implementation of particular features is dependent upon the selection of
hardware and the configuration of functions. Several IED models do not support certain
features. To determine whether a particular feature has been implemented within an IED,
identify the IED ordering number; and check the order number for the "G&T position" whilst
referring to the comparison table below. For more information, see
Table 10.4-2 Comparative table in respective ordering numbers
✓: Applicable
Sec. Feature
– Main features
NA: Not applicable
- 1298 -
Ordering No. at "G&T"
33 37
✓ ✓
6F2S1914 (0.49)
Detailed Error
Info. Lvl
N/A 3
Appendix: Ordering
.
GRL200 (Soft 033 & 037)
LED
On